Commit 11301d41 authored by Ji-Ze Hong (Peter Hong)'s avatar Ji-Ze Hong (Peter Hong) Committed by Johan Hovold
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USB: serial: f81232: add F81534A support 



The Fintek F81532A/534A/535/536 is USB-to-2/4/8/12 serial ports device
and the serial port is default disabled when plugin computer.

The IC is contains devices as following:
	1. HUB (all devices is connected with this hub)
	2. GPIO/Control device. (enable serial port and control GPIOs)
	3. serial port 1 to x (2/4/8/12)

It's most same with F81232, the UART device is difference as follow:
	1. TX/RX bulk size is 128/512bytes
	2. RX bulk layout change:
		F81232: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]...
		F81534A:[LEN][Data.....][LSR]

Signed-off-by: default avatarJi-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
[johan: reword an error message]
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent c4b8f971

drivers/usb/serial/f81232.c

+122 −6
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Fintek F81232 USB to serial adaptor driver

 * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver

 *

 * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)

 * Copyright (C) 2012 Linux Foundation
@@ -21,11 +22,36 @@ 
#include <linux/usb/serial.h>

#include <linux/serial_reg.h>



static const struct usb_device_id id_table[] = {

	{ USB_DEVICE(0x1934, 0x0706) },

#define F81232_ID		\

	{ USB_DEVICE(0x1934, 0x0706) }	/* 1 port UART device */



#define F81534A_SERIES_ID	\

	{ USB_DEVICE(0x2c42, 0x1602) },	/* In-Box 2 port UART device */	\

	{ USB_DEVICE(0x2c42, 0x1604) },	/* In-Box 4 port UART device */	\

	{ USB_DEVICE(0x2c42, 0x1605) },	/* In-Box 8 port UART device */	\

	{ USB_DEVICE(0x2c42, 0x1606) },	/* In-Box 12 port UART device */ \

	{ USB_DEVICE(0x2c42, 0x1608) },	/* Non-Flash type */ \

	{ USB_DEVICE(0x2c42, 0x1632) },	/* 2 port UART device */ \

	{ USB_DEVICE(0x2c42, 0x1634) },	/* 4 port UART device */ \

	{ USB_DEVICE(0x2c42, 0x1635) },	/* 8 port UART device */ \

	{ USB_DEVICE(0x2c42, 0x1636) }	/* 12 port UART device */



static const struct usb_device_id f81232_id_table[] = {

	F81232_ID,

	{ }					/* Terminating entry */

};

MODULE_DEVICE_TABLE(usb, id_table);



static const struct usb_device_id f81534a_id_table[] = {

	F81534A_SERIES_ID,

	{ }					/* Terminating entry */

};



static const struct usb_device_id combined_id_table[] = {

	F81232_ID,

	F81534A_SERIES_ID,

	{ }					/* Terminating entry */

};

MODULE_DEVICE_TABLE(usb, combined_id_table);



/* Maximum baudrate for F81232 */

#define F81232_MAX_BAUDRATE		1500000
@@ -61,6 +87,11 @@ MODULE_DEVICE_TABLE(usb, id_table); 
#define F81232_CLK_14_77_MHZ		(BIT(1) | BIT(0))

#define F81232_CLK_MASK			GENMASK(1, 0)



#define F81534A_MODE_REG		0x107

#define F81534A_TRIGGER_MASK		GENMASK(3, 2)

#define F81534A_TRIGGER_MULTIPLE_4X	BIT(3)

#define F81534A_FIFO_128BYTE		(BIT(1) | BIT(0))



struct f81232_private {

	struct mutex lock;

	u8 modem_control;
@@ -383,6 +414,47 @@ static void f81232_process_read_urb(struct urb *urb) 
	tty_flip_buffer_push(&port->port);

}



static void f81534a_process_read_urb(struct urb *urb)

{

	struct usb_serial_port *port = urb->context;

	unsigned char *data = urb->transfer_buffer;

	char tty_flag;

	unsigned int i;

	u8 lsr;

	u8 len;



	if (urb->actual_length < 3) {

		dev_err(&port->dev, "short message received: %d\n",

				urb->actual_length);

		return;

	}



	len = data[0];

	if (len != urb->actual_length) {

		dev_err(&port->dev, "malformed message received: %d (%d)\n",

				urb->actual_length, len);

		return;

	}



	/* bulk-in data: [LEN][Data.....][LSR] */

	lsr = data[len - 1];

	tty_flag = f81232_handle_lsr(port, lsr);



	if (port->port.console && port->sysrq) {

		for (i = 1; i < len - 1; ++i) {

			if (!usb_serial_handle_sysrq_char(port, data[i])) {

				tty_insert_flip_char(&port->port, data[i],

						tty_flag);

			}

		}

	} else {

		tty_insert_flip_string_fixed_flag(&port->port, &data[1],

							tty_flag, len - 2);

	}



	tty_flip_buffer_push(&port->port);

}



static void f81232_break_ctl(struct tty_struct *tty, int break_state)

{

	struct usb_serial_port *port = tty->driver_data;
@@ -666,6 +738,24 @@ static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) 
	return 0;

}



static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)

{

	int status;

	u8 mask;

	u8 val;



	val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE;

	mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE;



	status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val);

	if (status) {

		dev_err(&port->dev, "failed to set MODE_REG: %d\n", status);

		return status;

	}



	return f81232_open(tty, port);

}



static void f81232_close(struct usb_serial_port *port)

{

	struct f81232_private *port_priv = usb_get_serial_port_data(port);
@@ -810,7 +900,7 @@ static struct usb_serial_driver f81232_device = { 
		.owner =	THIS_MODULE,

		.name =		"f81232",

	},

	.id_table =		id_table,

	.id_table =		f81232_id_table,

	.num_ports =		1,

	.bulk_in_size =		256,

	.bulk_out_size =	256,
@@ -832,14 +922,40 @@ static struct usb_serial_driver f81232_device = { 
	.resume =		f81232_resume,

};



static struct usb_serial_driver f81534a_device = {

	.driver = {

		.owner =	THIS_MODULE,

		.name =		"f81534a",

	},

	.id_table =		f81534a_id_table,

	.num_ports =		1,

	.open =			f81534a_open,

	.close =		f81232_close,

	.dtr_rts =		f81232_dtr_rts,

	.carrier_raised =	f81232_carrier_raised,

	.get_serial =		f81232_get_serial_info,

	.break_ctl =		f81232_break_ctl,

	.set_termios =		f81232_set_termios,

	.tiocmget =		f81232_tiocmget,

	.tiocmset =		f81232_tiocmset,

	.tiocmiwait =		usb_serial_generic_tiocmiwait,

	.tx_empty =		f81232_tx_empty,

	.process_read_urb =	f81534a_process_read_urb,

	.read_int_callback =	f81232_read_int_callback,

	.port_probe =		f81232_port_probe,

	.suspend =		f81232_suspend,

	.resume =		f81232_resume,

};



static struct usb_serial_driver * const serial_drivers[] = {

	&f81232_device,

	&f81534a_device,

	NULL,

};



module_usb_serial_driver(serial_drivers, id_table);

module_usb_serial_driver(serial_drivers, combined_id_table);



MODULE_DESCRIPTION("Fintek F81232 USB to serial adaptor driver");

MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");

MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");

MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");

MODULE_LICENSE("GPL v2");

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